91234013 has 8 divisors (see below), whose sum is σ = 99598968. Its totient is φ = 83061504.

The previous prime is 91234009. The next prime is 91234051. The reversal of 91234013 is 31043219.

It can be written as a sum of positive squares in 4 ways, for example, as 15578809 + 75655204 = 3947^2 + 8698^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91234013 - 2² = 91234009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91234013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91234063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47120 + ... + 49017.

It is an arithmetic number, because the mean of its divisors is an integer number (12449871).

Almost surely, 2^91234013 is an apocalyptic number.

It is an amenable number.

91234013 is a deficient number, since it is larger than the sum of its proper divisors (8364955).

91234013 is a wasteful number, since it uses less digits than its factorization.

91234013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96223.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 91234013 is about 9551.6497527914. The cubic root of 91234013 is about 450.1793737581.

The spelling of 91234013 in words is "ninety-one million, two hundred thirty-four thousand, thirteen".